freebsd-skq/sys/dev/sdhci/sdhci_fdt.c
ian 4e5b50116d Fix fallout from r292180 (Dec 2015)... ensure that every driver which has
a DRIVER_MODULE() referencing mmc_driver has a MODULE_DEPEND() on mmc.  This
is because the kernel linker only searches for symbols in dependent modules,
so loading sdhci_pci (and other bus-flavors of sdhci) would fail when mmc
was not compiled into the kernel (even if you hand-loaded mmc first).

(Thanks to jilles@ for providing the vital clue about the kernel linker.)
2016-03-21 00:52:24 +00:00

312 lines
8.6 KiB
C

/*-
* Copyright (c) 2012 Thomas Skibo
* Copyright (c) 2008 Alexander Motin <mav@FreeBSD.org>
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* Generic driver to attach sdhci controllers on simplebus.
* Derived mainly from sdhci_pci.c
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/conf.h>
#include <sys/kernel.h>
#include <sys/lock.h>
#include <sys/module.h>
#include <sys/mutex.h>
#include <sys/resource.h>
#include <sys/rman.h>
#include <sys/sysctl.h>
#include <sys/taskqueue.h>
#include <machine/bus.h>
#include <machine/resource.h>
#include <machine/stdarg.h>
#include <dev/fdt/fdt_common.h>
#include <dev/ofw/ofw_bus.h>
#include <dev/ofw/ofw_bus_subr.h>
#include <dev/mmc/bridge.h>
#include <dev/mmc/mmcreg.h>
#include <dev/mmc/mmcbrvar.h>
#include <dev/sdhci/sdhci.h>
#include "mmcbr_if.h"
#include "sdhci_if.h"
#define MAX_SLOTS 6
struct sdhci_fdt_softc {
device_t dev; /* Controller device */
u_int quirks; /* Chip specific quirks */
u_int caps; /* If we override SDHCI_CAPABILITIES */
uint32_t max_clk; /* Max possible freq */
struct resource *irq_res; /* IRQ resource */
void *intrhand; /* Interrupt handle */
int num_slots; /* Number of slots on this controller*/
struct sdhci_slot slots[MAX_SLOTS];
struct resource *mem_res[MAX_SLOTS]; /* Memory resource */
};
static uint8_t
sdhci_fdt_read_1(device_t dev, struct sdhci_slot *slot, bus_size_t off)
{
struct sdhci_fdt_softc *sc = device_get_softc(dev);
return (bus_read_1(sc->mem_res[slot->num], off));
}
static void
sdhci_fdt_write_1(device_t dev, struct sdhci_slot *slot, bus_size_t off,
uint8_t val)
{
struct sdhci_fdt_softc *sc = device_get_softc(dev);
bus_write_1(sc->mem_res[slot->num], off, val);
}
static uint16_t
sdhci_fdt_read_2(device_t dev, struct sdhci_slot *slot, bus_size_t off)
{
struct sdhci_fdt_softc *sc = device_get_softc(dev);
return (bus_read_2(sc->mem_res[slot->num], off));
}
static void
sdhci_fdt_write_2(device_t dev, struct sdhci_slot *slot, bus_size_t off,
uint16_t val)
{
struct sdhci_fdt_softc *sc = device_get_softc(dev);
bus_write_2(sc->mem_res[slot->num], off, val);
}
static uint32_t
sdhci_fdt_read_4(device_t dev, struct sdhci_slot *slot, bus_size_t off)
{
struct sdhci_fdt_softc *sc = device_get_softc(dev);
return (bus_read_4(sc->mem_res[slot->num], off));
}
static void
sdhci_fdt_write_4(device_t dev, struct sdhci_slot *slot, bus_size_t off,
uint32_t val)
{
struct sdhci_fdt_softc *sc = device_get_softc(dev);
bus_write_4(sc->mem_res[slot->num], off, val);
}
static void
sdhci_fdt_read_multi_4(device_t dev, struct sdhci_slot *slot,
bus_size_t off, uint32_t *data, bus_size_t count)
{
struct sdhci_fdt_softc *sc = device_get_softc(dev);
bus_read_multi_4(sc->mem_res[slot->num], off, data, count);
}
static void
sdhci_fdt_write_multi_4(device_t dev, struct sdhci_slot *slot,
bus_size_t off, uint32_t *data, bus_size_t count)
{
struct sdhci_fdt_softc *sc = device_get_softc(dev);
bus_write_multi_4(sc->mem_res[slot->num], off, data, count);
}
static void
sdhci_fdt_intr(void *arg)
{
struct sdhci_fdt_softc *sc = (struct sdhci_fdt_softc *)arg;
int i;
for (i = 0; i < sc->num_slots; i++) {
struct sdhci_slot *slot = &sc->slots[i];
sdhci_generic_intr(slot);
}
}
static int
sdhci_fdt_probe(device_t dev)
{
struct sdhci_fdt_softc *sc = device_get_softc(dev);
phandle_t node;
pcell_t cid;
sc->quirks = 0;
sc->num_slots = 1;
sc->max_clk = 0;
if (!ofw_bus_status_okay(dev))
return (ENXIO);
if (ofw_bus_is_compatible(dev, "sdhci_generic")) {
device_set_desc(dev, "generic fdt SDHCI controller");
} else if (ofw_bus_is_compatible(dev, "xlnx,zy7_sdhci")) {
sc->quirks = SDHCI_QUIRK_DATA_TIMEOUT_USES_SDCLK;
device_set_desc(dev, "Zynq-7000 generic fdt SDHCI controller");
} else
return (ENXIO);
node = ofw_bus_get_node(dev);
/* Allow dts to patch quirks, slots, and max-frequency. */
if ((OF_getencprop(node, "quirks", &cid, sizeof(cid))) > 0)
sc->quirks = cid;
if ((OF_getencprop(node, "num-slots", &cid, sizeof(cid))) > 0)
sc->num_slots = cid;
if ((OF_getencprop(node, "max-frequency", &cid, sizeof(cid))) > 0)
sc->max_clk = cid;
return (0);
}
static int
sdhci_fdt_attach(device_t dev)
{
struct sdhci_fdt_softc *sc = device_get_softc(dev);
int err, slots, rid, i;
sc->dev = dev;
/* Allocate IRQ. */
rid = 0;
sc->irq_res = bus_alloc_resource_any(dev, SYS_RES_IRQ, &rid,
RF_ACTIVE);
if (sc->irq_res == NULL) {
device_printf(dev, "Can't allocate IRQ\n");
return (ENOMEM);
}
/* Scan all slots. */
slots = sc->num_slots; /* number of slots determined in probe(). */
sc->num_slots = 0;
for (i = 0; i < slots; i++) {
struct sdhci_slot *slot = &sc->slots[sc->num_slots];
/* Allocate memory. */
rid = 0;
sc->mem_res[i] = bus_alloc_resource_any(dev, SYS_RES_MEMORY,
&rid, RF_ACTIVE);
if (sc->mem_res[i] == NULL) {
device_printf(dev, "Can't allocate memory for "
"slot %d\n", i);
continue;
}
slot->quirks = sc->quirks;
slot->caps = sc->caps;
slot->max_clk = sc->max_clk;
if (sdhci_init_slot(dev, slot, i) != 0)
continue;
sc->num_slots++;
}
device_printf(dev, "%d slot(s) allocated\n", sc->num_slots);
/* Activate the interrupt */
err = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_MISC | INTR_MPSAFE,
NULL, sdhci_fdt_intr, sc, &sc->intrhand);
if (err) {
device_printf(dev, "Cannot setup IRQ\n");
return (err);
}
/* Process cards detection. */
for (i = 0; i < sc->num_slots; i++) {
struct sdhci_slot *slot = &sc->slots[i];
sdhci_start_slot(slot);
}
return (0);
}
static int
sdhci_fdt_detach(device_t dev)
{
struct sdhci_fdt_softc *sc = device_get_softc(dev);
int i;
bus_generic_detach(dev);
bus_teardown_intr(dev, sc->irq_res, sc->intrhand);
bus_release_resource(dev, SYS_RES_IRQ, rman_get_rid(sc->irq_res),
sc->irq_res);
for (i = 0; i < sc->num_slots; i++) {
struct sdhci_slot *slot = &sc->slots[i];
sdhci_cleanup_slot(slot);
bus_release_resource(dev, SYS_RES_MEMORY,
rman_get_rid(sc->mem_res[i]),
sc->mem_res[i]);
}
return (0);
}
static device_method_t sdhci_fdt_methods[] = {
/* device_if */
DEVMETHOD(device_probe, sdhci_fdt_probe),
DEVMETHOD(device_attach, sdhci_fdt_attach),
DEVMETHOD(device_detach, sdhci_fdt_detach),
/* Bus interface */
DEVMETHOD(bus_read_ivar, sdhci_generic_read_ivar),
DEVMETHOD(bus_write_ivar, sdhci_generic_write_ivar),
/* mmcbr_if */
DEVMETHOD(mmcbr_update_ios, sdhci_generic_update_ios),
DEVMETHOD(mmcbr_request, sdhci_generic_request),
DEVMETHOD(mmcbr_get_ro, sdhci_generic_get_ro),
DEVMETHOD(mmcbr_acquire_host, sdhci_generic_acquire_host),
DEVMETHOD(mmcbr_release_host, sdhci_generic_release_host),
/* SDHCI registers accessors */
DEVMETHOD(sdhci_read_1, sdhci_fdt_read_1),
DEVMETHOD(sdhci_read_2, sdhci_fdt_read_2),
DEVMETHOD(sdhci_read_4, sdhci_fdt_read_4),
DEVMETHOD(sdhci_read_multi_4, sdhci_fdt_read_multi_4),
DEVMETHOD(sdhci_write_1, sdhci_fdt_write_1),
DEVMETHOD(sdhci_write_2, sdhci_fdt_write_2),
DEVMETHOD(sdhci_write_4, sdhci_fdt_write_4),
DEVMETHOD(sdhci_write_multi_4, sdhci_fdt_write_multi_4),
DEVMETHOD_END
};
static driver_t sdhci_fdt_driver = {
"sdhci_fdt",
sdhci_fdt_methods,
sizeof(struct sdhci_fdt_softc),
};
static devclass_t sdhci_fdt_devclass;
DRIVER_MODULE(sdhci_fdt, simplebus, sdhci_fdt_driver, sdhci_fdt_devclass,
NULL, NULL);
MODULE_DEPEND(sdhci_fdt, sdhci, 1, 1, 1);
DRIVER_MODULE(mmc, sdhci_fdt, mmc_driver, mmc_devclass, NULL, NULL);
MODULE_DEPEND(sdhci_fdt, mmc, 1, 1, 1);